JP5843380B2 - Belt type vacuum packaging machine - Google Patents

Description

In the present invention, a packaging bag filled with an article to be packaged is set on a rotating belt that rotates intermittently, a vacuum chamber that moves up and down descends and comes into close contact with the rotating belt, and air in the chamber is sucked into the article to be packaged The present invention relates to a belt type vacuum packaging machine for vacuum packaging.

FIG. 3 is a partial side sectional view of a conventional belt-type vacuum packaging machine. In this figure, 1 is a rotating belt, 2 is a driving roller for rotationally driving the rotating belt, 3 is a vacuum chamber disposed above the rotating belt, and 4 is a crank mechanism for moving the vacuum chamber up and down.

In order to fill a packaging bag with an object to be packed and vacuum-packed, a vacuum chamber 3 that moves up and down is arranged on the upper part of a short rotating belt 1 that rotates intermittently. 1 is in close contact, and the packaging bag is vacuum-packed by sucking the air in the chamber 3.

A plurality of prismatic seal stands 5 are fixed on the upper surface of the rotating belt 1 at a predetermined interval in the rotation direction of the belt 1. These sealing bases 5 are arranged in the width direction of the rotary belt 1, and corresponding to the sealing base 5, an upper seal portion 6 is also provided in the vacuum chamber 3, and the sealing base 5 and the upper seal portion are provided. 6 forms a sealer that seals the bag mouth 7.

As shown in FIGS. 1 and 3 , a substantially “<”-shaped inclined plate 9 that supports the bag mouth of the packaging bag 8 is fixed to the upstream side surface of the seal base 5 with bolts. The inclined plate 9 has the same length as the seal base 5 and the side opposite to the side fixed to the seal base 5 is not fixed to the rotating belt 1 and floats in a free state. ing. The following bag mouth pressing rod 10 rides on the upper surface of the inclined plate 9 from above, and the lower portion of the bag mouth seal portion of the packaging bag 8 is sandwiched and fixed by the inclined plate 9 and the bag mouth pressing rod 10.

As shown in FIG. 4 , both ends of the bag mouth holding rod 10 are pivotally supported by shaft pieces 12 provided close to both ends of the seal base 5. After the bag mouth 7 of the packaging bag 8 is set on the seal base 5 before the bag mouth retainer bar 10 is pressed and sealed by the upper seal portion 6, the bag mouth 7 does not deviate from the heater surface. It is temporarily held with a metal rod.

As shown in FIG. 3 , a carry-out chute 11 is inclined and provided at a lower reverse position on the carry-out side of the rotating belt 1. The sealed packaging bag 8 falls at the carry-out portion of the rotating belt 1 and is received by the carry-out chute 11.

The carry-out chute 11 of the conventional belt-type vacuum packaging machine is attached by drawing a rotation locus 13 as shown in FIG. Flip outside. For this reason, it is necessary to attach the carry-out chute 11 so as to be positioned outside the rotation locus 13 so that the bag mouth pressing bar 10 does not contact.

As the attachment position of the carry-out chute 11, the position indicated by the phantom line in FIG. 4 is a preferred position with less impact when the packaging bag 8 is dropped. A small packaging bag is almost caught in the gap. For this reason, in order to receive the packaging bag 8 safely and reliably, the carry-out chute 11 is unavoidably attached to the lower part of the rotating belt 1 indicated by a solid line.

However, as shown in FIG. 3 , when the carry-out chute 11 is attached to the lower part of the rotating belt 1, the packaging bag 8 rolls forward and falls onto the carry-out chute 11, and the drop distance becomes considerably large. The packaged items are heavy (eg broiler wings), hard (eg frozen tuna), sensitive to impact (eg oden eggs), easy to pinhole (eg gas Pack) etc., the damage was great. In addition, since the package rolls forward and drops strongly, the front and back and the posture of the package bag 8 after discharge are disjointed, and there is a difficulty in automating the inspection process and the boxing process in the next process.

As a method of improving the above conventional problems, the packaging bag is such that the bag mouth 7 is on the front side of the operator (upstream side of the rotating belt) and the bag bottom is on the side far from the operator (downstream side of the rotating belt). 8 was reversely arranged, and the bag mouth 7 was sealed on the seal stand 5.

As described above, the direction of the packaging bag 8 placed on the rotating belt 1 is reversed, and the bag mouth 7 is sealed by the sealing base 5 and the upper sealing portion 6, and then the bag bottom is removed at the carry-out portion of the rotating belt 1. If the bag is slid down from the side, the bag bottom side is not pressed by the bag mouth holding bar 10, and as shown in FIG. be able to. Accordingly, the packaging bag 8 can be received even at the position of the carry-out chute 11 indicated by the phantom line.

In addition, the attachment positions of the inclined plate 9 and the bag mouth holding bar 10 are reversed, and the position of the shaft piece 12 that pivotally supports both ends of the bag mouth holding bar 10 is on the upstream side of the seal base 5. As shown in FIG. 4 , the bag mouth pressing rod 10 does not open outwardly due to the centrifugal force of the rotating belt 1. For this reason, since the rotation locus 13 of the bag mouth holding rod 10 is also reduced, the discharge chute 11 can be attached close to the rotating belt 1.

However, in the case of such a vacuum packaging machine in which the packaging bag 8 is reversely arranged, in the case of a liquid article to be packaged, the rotating belt 1 cannot be arranged in an ascending gradient at the operator's working position. There was a problem that it was not possible to cope with the packaged items.

Therefore, in order to improve the conventional vacuum packaging machine, a belt-type vacuum packaging machine as in Patent Document 1 has been proposed. In the belt-type vacuum packaging machine of Patent Document 1, an arm shaped like an L-shape rotated 90 degrees counterclockwise is provided at one end of an opening pressing member (bag mouth pressing bar 10). The arm is provided with a support shaft at one end, and is pivotally supported by the seal base via the support shaft.

A horizontal receiving side portion hangs below the support shaft of the arm, the horizontal receiving side portion collides with an operating pin that protrudes and is fixed to the rotating belt side near the discharge portion of the rotating belt, and the arm is centered on the supporting shaft. Rotate to. As a result, the opening pressing member (bag holding bar 10) is forcibly separated from the packaging bag after the vacuum / sealing packaging process, so that the packaging bag does not wrap around the opening pressing member. Is discharged smoothly.

Moreover, in the packaging machine of Patent Document 1, since the opening pressing member (bag mouth pressing bar) has finished rotating at the carrying-out portion of the rotating belt, the rotating machine draws a rotation locus as shown in FIG. Accordingly, the interval between the carry-out chute and the carry-out of the rotary belt can be reduced, and the packaging bag is less likely to be fitted into the gap.

Japanese Patent No. 3848663

In the belt-type vacuum packaging machine of Patent Document 1, the horizontal receiving side of the arm collides with the operating pin in the vicinity of the discharge portion of the rotating belt, and the arm rotates around the support shaft. However, since the horizontal receiving side portion hangs slightly from the support shaft, the opening holding member (bag mouth holding rod 10), which is quite heavy, can be considerably rotated to rotate around the support shaft of the arm. Requires power. For this reason, when the horizontal receiving edge collides with the operating pin at the same speed as the moving speed of the belt, a considerable impact is applied, so that the horizontal receiving edge and the operating pin are consumed significantly.

Furthermore, the belt-type vacuum packaging machine as in this case is not limited to long and large packaging bags, but must be compatible with thin and short packaging bags, but the clearance between the carry-out chute and the rotating belt must be about 30 mm. If it is too wide, the thin and short packaging bag may be caught in the gap. However, when the height of the opening pressing member (bag mouth pressing bar 10) of Patent Document 1 is lowered and the horizontal receiving side of the arm is shortened in order to narrow the gap, as described above, the operating pin and the horizontal receiving pin are arranged. There is a possibility that the impact with the side part is too strong to endure practical use. On the other hand, if the horizontal receiving side is suspended long and the position of the support shaft of the arm is raised from the belt surface, the gap between the carry-out chute and the rotary belt carry-out must be widened.

In order to solve the above problems, even if the mounting position of the carry-out chute of Patent Document 1 is slightly lowered, the opening holding member (bag mouth holding bar 10) is the reverse position of the carry-out portion of the rotating belt. The opening retainer (bag mouth retainer bar 10) hangs away from the belt due to its own weight, so that the opening retainer contacts the unload chute unless the unload chute is shifted downward. There is a risk of doing. Therefore, in Patent Document 1, the intended purpose of providing the carry-out chute above the carry-out portion of the rotating belt and carrying out the packaging bag softly is not achieved.

In view of the above-described problems, the present invention arranges a carry-out chute while keeping a minimum gap so that even a thin packaging bag is not caught, and slides down the carry-out chute without causing the packaging bag to roll forward. An object of the present invention is to provide a belt-type vacuum packaging machine that is low in cost and can be carried out in an aligned state with little impact of dropping of the bag, at least without inversion of the front and back.

In the present invention, the upstream side of the rotating belt is the working position of the operator, the downstream side is a carry-out unit for carrying out the sealed packaging bag, and the packaging bag filled with an article to be packaged is placed on the rotating belt, In a belt-type vacuum packaging machine in which a vacuum chamber is in close contact with a rotating belt from above the packaging bag, and the packaging bag is vacuum-packed with a negative pressure inside the chamber, a seal for sealing the bag mouth in the width direction of the rotating belt A base is arranged, and the bag mouth holding rod is pivotally supported in the longitudinal direction along the seal base, and a carry-out chute is provided close to the circumference of the carry-out side of the rotating belt, Near the upstream side of the base, the inclined plate is fixed on the rotating belt, the lower portion of the bag mouth seal part of the packaging bag is sandwiched and fixed by the inclined plate and the bag mouth holding bar, and the packaging bag rotates. When you go to the circumference of the carry-out side by the belt, A gap is formed between the downstream side of the base and inclined plate, sealed bag mouth moves away from the sealing platform, the packaging bag to the discharge chute side by the inclined plate is unloaded, it is characterized.

If the inclined plate is not fixed to the sealing base as in the above configuration, but fixed to the rotating belt, when the packaging bag sealed by the sealing base reaches the circumferential portion on the carry-out side of the rotating belt, the upstream side of the inclined plate is Since it does not lift from the surface of the rotating belt, the packaging bag is not caught on the inclined plate. On the contrary, since the upstream side of the inclined plate is fixed to the rotating belt, the inclined plate makes it easier for the inclined plate to slide down the packaging bag after vacuum packaging toward the unloading chute like a slide.

Furthermore, when the packaging bag advances to the circumferential portion on the carry-out side of the rotating belt, a large gap is formed between the sealing base and the downstream side of the inclined plate, and the sealed bag opening separates from the sealing base. The bag mouth pressed by the presser bar is released, and the bag mouth is not caught in the bag port presser bar at the carry-out part.

In the belt-type vacuum packaging machine of the present invention, the inclined plate makes the packaging bag after vacuum packaging easily slide down to the carry-out chute side like a slide.

Explanatory drawing which shows the effect | action of the conventional inclination board Explanatory drawing which shows the effect | action of the inclination board of a present Example Partial side sectional view of a conventional belt-type vacuum packaging machine Explanatory drawing of operation of carry-out part of conventional belt type vacuum packaging machine

Embodiments of the present invention will be described below with reference to the drawings. In addition, the same code | symbol of drawing is used about the same structure as the past. The belt-type vacuum packaging machine of Patent Document 1 has a problem in that the packaging bag 8 sealed on the sealing table is easily caught on the corner of the sealing table and is stably carried out. Further, in the vacuum packaging machine shown in FIGS. 3 and 4, since the inclined plate 9 is directly fixed to the seal base 5 with bolts as shown in FIG. 1, the inclined plate is moved to the carry-out portion of the rotating belt 1. The side on the upstream side of 9 rises from the surface of the rotating belt 1, and the packaging bag 8 is easily caught on the inclined plate 9. Furthermore, since the bag mouth 7 is held down by the bag mouth holding rod 10 at the carry-out portion, the bag mouth 7 is attached to the bag mouth holding rod 10 when the packaging bag 8 after vacuum packaging is carried out from the rotary belt 1. May wrap around and the packaging bag 8 may collide with the carry-out chute 11 or may fall into the gap between the rotary belt 1 and the carry-out chute 11.

In this embodiment, as shown in FIG. 2, the inclined plate 9 is fixed to the upstream rotating belt 1 close to the seal base 5. As described above, when the inclined plate 9 is fixed to the rotating belt 1, when the packaging bag 8 sealed by the sealing base 5 reaches the circumferential portion on the carry-out side of the rotating belt 1, the upstream side of the inclined plate 9 is the rotating belt 1. Therefore, the packaging bag 8 is not caught on the inclined plate 9. On the contrary, since the upstream side of the inclined plate 9 is fixed to the rotary belt 1, the inclined plate 9 makes the packaging bag 8 after vacuum packaging easily slide down to the unloading chute 11 side like a slide in the carry-out portion.

When the packaging bag 8 further advances from the left end position in FIG. 2, a large gap is formed between the sealing base 5 and the downstream side of the inclined plate 9, and the sealed bag mouth 7 is separated from the sealing base 5. The bag mouth 7 held by the mouth holding rod 10 is released, and the bag mouth 7 is not caught in the bag mouth holding rod 10 at the carry-out portion. 8 can be carried out.

As described above, the impact when the packaging bag 8 drops onto the carry-out chute 11 is reduced, and the packaging bag 8 does not fall into the gap between the carry-out chute 11 and the rotating belt 1 and is stable without reversing the front and back. In order to discharge, the bag mouth 7 is separated from the bag mouth holding rod 10 so that the packaging bag 8 slides down on the carry-out chute 11 while drawing a discharge trajectory upward from the inclined plate 9.

The present invention is, for example, a belt-type vacuum in which a packaging bag filled with an object to be packaged is set on a rotating belt that rotates intermittently, the vacuum chamber is lowered, and the air in the chamber is sucked to vacuum package the object to be packaged. Useful for packaging machines.

DESCRIPTION OF SYMBOLS 1 Rotating belt 3 Vacuum chamber 5 Seal stand 7 Bag mouth 8 Packaging bag 9 Inclined plate 10 Bag mouth holding stick 11 Unloading chute

Claims (1)

The upstream side of the rotating belt is used as the working position of the operator, the downstream side is used as a carry-out unit for carrying out the sealed packaging bag, and the packaging bag filled with an article to be packaged is placed on the rotating belt. In the belt-type vacuum packaging machine in which the vacuum chamber is in close contact with the rotating belt and the packaging bag is vacuum-packed with a negative pressure inside the chamber,
A seal stand for sealing the bag mouth is arranged in the width direction of the rotating belt, and a bag mouth presser bar is pivotally supported in the longitudinal direction along the seal stand, and the carrying out side of the rotating belt. An exit chute is provided close to the upper part of the circumferential portion of the bag, and an inclined plate is fixed on the rotating belt adjacent to the upstream side of the seal base, and the bag mouth of the packaging bag is formed by the inclined plate and the bag mouth pressing bar. When the lower portion of the seal portion is sandwiched and fixed, and the packaging bag advances to the carry-out circumferential portion by the rotating belt, a gap is formed between the seal base and the downstream side of the inclined plate, and the sealed bag mouth A belt-type vacuum packaging machine characterized in that the packaging bag is unloaded from the sealing table and moved toward the unloading chute by an inclined plate.

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